Mold for making building blocks



July 15, 1924. A 1,501,644

O. E. BORNH-AUSERET AL MOLD FOR MAKING BULDING BLocxs Filed Feb. 17, 1923 2 Sheets-Sheet l 4 /7 l f3 u July 15 1924.

o. E. BoRNHAusER ET AL MOLD FOR MAKING BUILDING BLOCKS Filed Feb. '17.

1923 2 Sheets-Sheet 2 Patented July 15, 1924.

UNITED STATES PATENT OFFICE.

OTTO E. BOXRNHAUSER AND JOHN EDWARD HERMAN, OF SANDUSKY, OHIO.

Application filed 'February 17, 19'2'3. 4Serial v110.6153505.

To all ywhom it may concern:

Be it known 'that we, OTTO E. lonivriansian and Jol-1N EDWARD HERMAN, citizens of the United States, residing at Sandusky, iin the count).7 of Erie and State of Ohio, have invented a new and use-ful Mold for Making Building Blocks, ot which the follow-ing is a specification. y

'Our in\fentifon relates to improvements in Imolds 2tor making building` bloc-lts, and more especially to a mold suitable for making a hollow product composed of cementitions material consisting largely ot gypsum.

@ur imp-roved mold is pretera'bly oblong in 'plan and preferably comprises the foll'owing-A substantially horizontal moldbottom, two longitudinal plates 'disposed to torni substantially parallel opposite `side walls respectively of the materilil-receiving chamber lot the mol-d 'and normally held in a substantially vertical position ran-d adapted to 'be loosened in relation to the Vproduct to be "formed in said chamber, Aa transverse plat-e disposed to form one end wall of said chamber and norn'ially held in a substantiall)y vertical position and adapted to be moved into a position permitting movement volE said product at said transverse pla-te substantially horizontally endwise ot and trom between the longitudinal plates, a slidab-le transverse plate arranged to torni the other end wall ot' said Achamber and normally in Aposition to be slid between the longitudinal plates toward the iirst-inentioned transverse plate and lhaving vertically spaced holes which extend trom side to side of l'said 'slidable plate, a Vstationary abutment-mem'- 'ber arranged to torni an abutment for the 'ou-ter side of said slid'able plate, and vertically spaced cores which are substantially parallel with the path ot' and unattached 'to said "slid-able plate and rigid with said abutmeut-member and engage the diHerent 4aioresaid holes respectively and, in the normal `position ot said slidable plate, are closely embraced by `said plate at the inner side ot the plate and extend through said plate and troni said plate in the direction ot' and taper toward the vfirst-mentioned 'transverse plate.

vOne object 'ot this invention is to have the walls of said holes and the ycore-portions which extend through said holes in't'h'e norm'al .position of the hereinbetore mentioned Vslida'ble plate relatively arranged and conedges ont said plate in the normal position of f the plate.

Another object is to construct a mold ot the character indicated from which the building block or product formed in the mold can bereadily removed horizontally from the mold, and to utilize the hereinbefore mentioned slid'albll-e plate, independently ot the. other plates employed in torming upright walls oi' the mold, in `effecting a forcible removal of said product horizontally from the mold.

Another object is lto utilize movement of said slid-able plate vendwise of the .mold in one direction to remove a hollow prod-uct from la mold comprising the hereinbetore mentioned cores, and to utilize movement of said plate in lthe opposite ldirection in cleaning said core's.

Another object. is to facilitate the work of the hereinbeore mentioned lslidable plate in discharging the product from the mold.

Another obj ect is to render our improved mold simple and durable in construction 'and reliable and coi'ivenient in its operation, and more especially to facili-tate and insure the maintenance of the mold a clean condition.

7With these objects in view, and to attain any other vobject lhereinafter appearing, our

invention consists incertain features of construction, Aand combinations and relative arrangements ot parts, hereinafter described in this specillication, pointed out inthe claims, and illustrated in the accompanying drawings In said drawings, Figure l is a top plan 'oi' a. mold embodying vour invention. Fig. Q Vis rva 'vertical longitudinal section taken along 'the line 2 9 in F 1 Figs. 3 'and 4 are vertical transverse "sections taken along the lin@ 8&3 :and line Al--ei 'respectively in Fig. '2. Fig. -5 is a vertical section, in 'detai1l,show`ing a portion o- Afa core off the mold and the adjacent portion of 'thfe 'slidable transverse plate surrounding said llO core. Fig. 6 is a vertical section taken along the line 6 6 in Fig. Fig. 7 is a side view of the mold, with the pivoted plates of the mold swung outwardly and downwardly. Fig. 8 is a side view corresponding with Fig. 7, except that in Fig. 8 the hereinbefore mentioned slidable plate is shown as having been slid endwise of the mold as required to discharge the product from the mold. Fig. 9 is a transverse. vertical section taken along the line 9-9 in Fig. 8. Figs. 5 and 6 are drawn on a larger scale than Figs. 1, 2, 3, 4, 7, 8 and 9, and portions broken away in the drawings to reduce their size.

Referring to said drawings, 12 indicates a bench or table on which is mounted the substantially horizontal stationary metal bottom 13 of our improved mold which is preferably oblong in plan, and said bottom preferably consists of a metal plate lying on said table and removably secured to the table by bolts or screws 14, as shown in Fig. 2, and 15 (see Figs. 1, 2, 8 and 4r) indicates the material-receiving interior chamber of the mold, and in said chamber a building tile or block is adapted to be formed. Said chamber is rectangular in plan and open at its upper end to permit the feeding of wet or moist. cementitious material into said chamber from above in any approved manner.

Our improved mold (see Figs. 1, 2, 8 and 4) is shown as comprising a pair of spaced upright metal side plates 16 which extend longitudinally of the mold and are disposed to form two substantially parallel opposite side walls respectively of the chamber 15, and said mold also comprises a pair of transverse upright metal plates 17 and 18 which are disposed to form opposite end walls respectively of said chamber. The mold-bottom 18 extends under the plates 16, 17 and 18.

The transverse plate 17 (see Figs. 1, 2 and extends between the longitudinal plates 16 and has narrow side edges overlapped by said longitudinal plate-s and is substantially' vertical and rests on the moldbottom 18, and said transverse plate is normally adapted and in position to be slid bodily between and independently of the plates or walls 16, in the direction and independently ot the transverse plate 18 and normally held against movement in the op-l posite direction by a substantially vertical stationary alnitment-member 2O at the outer side of the slidable plate 17, and said member 2O is arranged to form an abutment for said outer side of said slidable plate in the normal position of the plate.

The mold-bottom 13 terminates, at its end which is adjacent the transverse plate 18, in an undercut transverse edge 21 shown in Fig. 2, and said plate 18 (see Figs. 1 2 and 4) is normally held in a substantially vertical position and adapted to be moved into a position permitting movement of a building block substantially horizontally at said plate endwise of and from between the longitudinal plates 16, as will hereinafter more fully appear.

The transverse plate 18 (see Figs. 1 and 2) is provided, at its lower end, with a downwardly and outwardly projecting ear 22 which is pivoted, as at 28, horizontally and transversely of the mold, to an ear or member 2l formed on and projecting from the mold-bottom 18 below the top surface of said bottom. `Said plate 18 is therefore piv oted, at its lower end and externally of the chamber 15, to the mold-bottom 18 and arranged as required to permit the plate to swing outwardly and downwardly when the plate is free to be swung outwardly and downwardly. Said plate 18 has an outwardly facing` beveled bot-tom edge 25, as shown in Fig. 2, and in its normal and substantially vertical position only rests at the lower extremity of said edge on the top surface of the mold-bottom 18 near the un dercut edge 21 of said bottom, and said undereut edge 21, and the contact of said plate 18 only at said extremity of its bottom edge with the mold-bottom, facilitate the keeping of adjacent portions of the mold-bottom and said plate in a clean condition. lVe would here remark that the plate 18 extends between the longitudinal plates 16 which, in the normal and substantially vertical posi-- tion of said plate 18, abut against the side edges of said plate 18, as shown in Fig. 1. Said plate 18 has its outer side beveled, as at 26 in Fig. 1, at the side edges of the plate to lessen the contact between said plate 18 and each longitudinal plate 16 and to facili tate the keeping of the joint between said plates in a clean condition.

The transverse plate 18 is normally held in a substantially vertical position (see F 2), and means for preventing movement of said plate outwardly in said position of the plate comprises an upright brace 27 arranged at the outer side of the plate centrally between the side edges of the plate. Said brace is pivoted at its upper end, as at 28, horizontally and transversely of the mold, to an ear 29 formed on the plate 18. Said brace at its lower end engages the top of the table 12 and is disposed as required for holding the connected plate 18 in its substantially vertical and normal position. Obviously the actuation of the said brace outwardly in any approved manner renders the plate 18 free to be swung outwardly and downwardly from its substantially vertical and normal position shown in Figs. 1 and 2 into al horizontal position shown in Figs. 7 and 8 and onto pins or upwardly projecting members 30 with which the table 12 is providedV The relative arrangement of the isere-44 parts is such that the plate 18, upon being swung into said horizont-al position, is below the mold-chamber and therefore in a position permitting movement thereover of a building block or product substantially horizontally from between the longitudinal plates 16.

rlhe mold-bottom 13 (see Figs. 1 and 3) is provided, adjacent the lower end of each side edge of each longitudinal plate 16, with a horizontallyv outwardly projecting member 31, and said plate is provided adjacent said member 31 with a member 32 which projects from the outer side of said plate at a point above said bottom laterally and outwardly and tern'iinates at its outer end in 'an ear 33 arranged at one side of said member Y31, and a pivotal pin 85, arranged horizontally and longitudinally of said plate and substantially at a right angle to the axis vof the pivoted transverse plate 18, is shown extending from within said ear 33 into the intermediate hole of a horizontal row of threecorrespondingly arranged holes 36 which are formed in and spaced endwise of said member y31. Obvi ously the longitudinal plates 16, upon disengaging the pins from the intermediate holes in the members 31 of the mold-bottom, can be readjusted laterally to bring the pins 35 into engagement with the inner holes or outer holes of the rows of holes 36 in said members 31. Obviously1 the mold-chamber 15 is reduced or increased in width according as the plates 16 are readjusted toward or from each other, and `of course the illus- Vtrated transverse plates 17 and 18 are replaced by narrower or wider plates according as the longitudinal plates 16 are readjusted to reduce or increase the distance between them. By the hereinbefore described construction it will be observed that each longitudinal plate 16 is pivoted, at its lower end and externally of the chamber 15, to the mold-bottom 1S and arranged as required to permit the plate to swing outwardly and downwardly when the plate is free to be swung outwardly and downwardly.

Each longitudinal plate 16 has an outwardly facing beveled bottom vedge 37, as shown in Fig. 4, and, in its normal and substantially vertical position, only rests at the lower extremity of said edge on the top surface of the mold-bottom 18, and said moldbottom is wide enough to extend under the longitudinal plates 16 in the dierent hereinbefore mentioned lateral readjustments of said plates. Contact of the longitudinal plates 16 only at the lower extremities of their bottom edges 37 with the mold-bottom 13 facilitates maintenance of the joints be tween the mold-bottom and said .plates in a clean condition.

Each longitudinal vplate 16, in its normal and substantially vertical position (see Fig. 4), is braced at its outer side, centrally between the side edges of the plate, by an upright brace 38 pivoted at its upper end, as at 39, horizontally and longitudinally of the mold to an ear 40 Vwith which said plate is provided, 'and said brace 38 at its lower end engages the -t-op "of the table 12 and is disposed as required for holding the connected plate 1:6 in its substantially vertical and normal position. @bviously -the actuation of the said brace 38 outwardly in any approved manner renders the connected plate 16 loose in relation to a building block or product formed in the mold and facilitates the removal of said product endwise of and from between the longitudinal plates 16. Preferably the longitudinal plates 16, upon rendering the connected braces 88 inoperative by actuating said braces outwardly, are swung outwardly and downwardly from their substantially vertical and normal position shown in Figs. 1 and 4 into a depending position shown in Figs. 7, 8 and 9, and the top of the table 12 is slotted or cut away, as at 41, to permit such movement of said plates.

The abutment-member 2O (see Fig. 1) has two substantially vertical sides 42 facing and converging toward the outer side of the slidable plate 17 and substantially meeting at their adjacent extremities. Said outer 'side of said slidable plate `comprises two surfaces 43 which face and converge toward the abut-ment-member 2O and substantially meet at their adjacent extremities, and the rela-- tive arrangement of the parts is such that the substantially meeting extremities -of said surfaces 43 are directly opposite the aforesaid substantially meeting extremities of the sides 42 of said abutment-member. It will be observed, therefore, that the slidable plate 17 and the abutment-member 2O are relatively contouied to effect contact between them 'only centrally between the side edges of said plate in the normal position of the plate so as to facilitate the maintenance of the opposing surfaces of said members 17 and 2O in a clean condition.

The mold-bottom 13 see Fig. 2) extends under the abutment-member 2O and a suitable distance outwardly beyond said abutment-member, and a substantially vertical standard 45, arranged at the outer side of said abutment-member, is preferably formed integral with said bottom, and said abutment-member is removably secured to said standard by bolts or screws 46. Y

yThe-slidable transverse plate 17 (see Figs. 2 and 3) is shown as 'having three vertically spaced horizont-al holes 47 which are formed between the top and bottom edges of said plate and centrally between the side edges of the plate and extend through said plate from the inner side of the plate to the outer surfaces 43 of the plate. Preferably each hole 47 (seealso Fig. 5) lis uniform in diameter 'from end to end and substantially parallel with the path or' the slidable plate 17.

Our improved mold (see Figs. 2, 8 and is shown as comprising three vertically spaced substantially horizontal stationary hollow cores 48 which extend endwise of the mold and engage the different holes 47 respectively in the slidable plate 17 and are substantially parallel with the path of said plate. Preferably said cores are `formed integral with the abutment-member 20 and extend therefore from said abutment-member into the holes 47 and are unattached to the slid-able plate 17 and, in the normal position of said plate, extend through said plate and from the inner side of said plate in the direction of and taper toward the pivoted transverse plate 18, and the relative arrangement oit' the parts is preferably such that in its substantially vertical and normal position said pivoted plate 18 abuts against the adjacent ends orn said cores. lThe taper of the cores 48 toward the pivoted transverse plate 18 is exaggeratively illustrated. Each core 48 (see Figs. 2, 8, 5 and 6) is closely embraced by the slidable plate 17 at the inner side of said plate in the normal position of the plate and has its portion which extends through said plate in said position of the plate tapering or gradually reduced transversely toward the outer side ot the plate and therefore' toward the abutment-member 20. Obviously, therefore, the walls of the holes 47 and the coreportions which extend through said holes in the normal position of the sl'idable plate 17 are relatively arranged and contoured to eftect the formation, around and endwise of each of said core-portions in said position of said plate, of a space increasing in dimensions transversely toward and extending to the outer side of said plate and communicating with the space between opposing' sur- `faces 42 and 43 of the members 17 and E20. lVe would here remark that the attachment of the abutment-member 20 removably to the standard 45 permits the replacement of said abutment-member, when required, by an abutment-member having cores larger or smaller in dimensions than the illustrated cores 48.

Means for actuating the slidable plate 17 (see F ig. 2) are provided and preferably comprise two vertically spaced substantially horizontal rods which are substantially parallel with the path of said plate and threaded into the central portion of said plate and extend from said plate loosely through holes 51 in the abutment-member 20 and loosely through holes 52 in the standard 45 and outwardly beyond said standard a suitable distance. Said rods 50 are con-- neet-ed together at their outer ends by a handle 53 to which is attached one end ot a cable 54 attached. at its other end to and operatively engaging a windlass 55 formed by one end portion of a horizontal shaft 56 which, as shown in Figs. 1 and 2, is arranged at the outer side of the standard 45 and between and substantially at a right angle to said rods and supported from brackets 57 rigid with said standard. Said shaft (see Fig. 8) is provided with a crank 58 for rotating the shaft.

In operation, the mold-chamber 15 is filled with wet or moist cementitious material in any approved manner, and when said material has sufficiently set or hardened in said chamber to form the desired building block or product the braces 27 and 38 are swung outwardly to loosen the pivoted plates 16 and 18 :in relation to said product so as to permit the longitudinal plates 16 to release the product and so as to permit the pivoted transverse plate 18 to be swung outwardly and downwardly into a horizontal position shown in Fig. 7, whereupon the windlass 55 is rotated in the direction required to wind up cable so as to actuate the rods 50 and connected slidable plate 17 in the direction of the lowered pivoted transverse plate 18 and thereby shove the product over said lowered plate 18. F ig. 7 shows a building block 60 which has been formed in the mold and which is to be removed endwise of and from between the longitudinal plates 16, and Fig. 8 shows said block as having been removed from between said plates and onto the lowered pivoted transverse plate 18 from which said block is received by a conveyer (not shown) or removed in any other approved manner. Because of the cores 48 obviously the illustrated product is a hollow building block having parallel holes 61 shown in broken lines in Fig. 8, and the tapering of said cores in the direction of the pivoted transverse plate 18 obviously facilitates loosening of the product in relation to said cores during movement of the product endwise of the mold and from the mold-bottoni 13 to and over said lowered plate 18. Gbviously upon the removal of said building block from said lowered plate 18 the handle 58, and consequently the rods 50 and connected slidable plate 17, are pulled in the direction and to the extent required to return said slidable plate into its normal position in which, as hereinbefore indicated, said slidable plate is in contact with the abutment-member 20, and upon said return of said slidable plate into its normal position the plates 1G and 18 are returned into and held in their substantially vertical and normal position prparatory to and during the next production of a building block or product in the mold. le 'would here remark that by the hereinbefore described construction and relative arrangement of parts the slidable plate 17, during movement of said plate from the position shown in Figs. Z and 8 intoits; norma-l position shown in Figs. l and 2, serves to insure clean joints between said plate and the cores 48 at the inner side of the plate upon said movement of said plate, and the hereinbefore described taper of the coreportions which are surrounded by said plate in the normal position of said plate, and the enlargement, toward said abutmentinember, of the space formed around and endwise of each core between said core and the core-surrounding portion of said plate in said normal position of said plate, permit and facilitate the, escape of material from between said portion of said plate and said core into the space formed, as hereinbefore described, between each of the converging sides o r surfaces 42 of said abutment-member and the opposing surf-ace of the converging sur-faces 43 of said plate.

What we claim is- 1. A mold of the character indicated comprising a pair off spaced opposite upright walls and two4 spaced opposite upright walls arranged substantially at a right angle to the irst-mentioned walls, one of the secondmentioned walls being a slidable wall disposed to move between and independently of the first-mentioned walls, the other of 4said second-mentioned walls being movable into a position permitting movement of a building block or product substantially horizontally from between the first-mentioned walls by said slidable wall, and said slidable wall being normally in position to be slid substantially horizont-ally and independently of said first-mentioned walls in the direction in which the inner side of' saidV slidable wall faces.

2. A mold of the character indicated having a bottom and comprising a pair of spaced plates which are disposed to for-m opposite upright walls respectively of the mold and adapted to be rendered loose in relation to a building block or product formed between said walls, said mold also comprising a pair of snaced opposite plates disposed to form uprig t walls of the mold, one of the secondmentioned plates being a slidable plate arranged substantially at a right angle to and extending between thefirst-mentioned plates and normally in position to be slid independently of said firstmentioned plates in the direction and independently of the other plate ofv the secondmentioned pair of plates and normally immovable in the opposite direction, the lastmentioned plateV of said second-mentioned pair ofplats being movable into a position permittingmovement ofthe aforesaid product from between the first-mentioned plates by the aforesaid slidable plate, and said first-mentioned plates having outwardly facing beveled bottom edges and normally resting, at; the lower extremities of said edges,

on the top surface of the aforesaid bottom.

3. A mold of the characterindicated comprising two spaced opposite upright side plates, and two spaced upright opposite transverse plates extending from one to, the,

other. of the side plates, one transverse plate being a slidable plate extending between the side platesl and normally in position toy be slid independently of the side plates in the direction and independently of the .other transverse plate and normally immovable in the opposite direction, and the last-mentioned transverse plate being movable into a position permitting movement of a buildingblock or product from between and in--V slidable wall which is normally spaced themaxirnum distance from the aforesaid pivoted wall and adapted to be .slid independently of the first-mentioned walls the distance required to effect the removal ofv a building block or product substantially horii zontally over said pivoted wall and from between the first mentioned walls by the aforesaid slidable wall upon swinging said pivoted wall into the aforesaid position.

5. A mold of the character indicated comprising a substantially horizontal bottom, two spaced opposite side walls, and two transverse plates disposed to form opposite end walls respectively of the mold, one transverse plate having an outwardly' facing beveled bottom edge and being in contact at the lower extremity of said edge with the top surface of the aforesaid bottom and pivoted at its lower end to said bottom, said transverse plate extending from one to the other of the aforesaid side walls and arranged to be swung outwardly intor a position lower than said surface, the other transverse plate being a slidable plate normally in position to be slid between and independently of said side walls in the direction required to effect the removal ofV a building block or product substantially horizontally over the pivoted transverse plate upon swinging said pivoted plate into the aforesaid position, andthe aforesaid bottom terminating adjacent 'the pivoted transverse plate in an undercut transverse edge.

6. A mold of t-he character indicated comprising a substantially horizontal bottom,

a pair ot spaced opposite and laterally adjustable uprtght walls, and two spaced opposite upright walls arranged substantially at a right angle to said adjustable walls, one of the second-mentioned walls being a slidable wall disposed to move between and independently of the first-mentioned walls, the other o1 said second-mentioned walls being movable int-o a position permitting movement of a building block or product substantially horizontally from between the first-mentioned walls by said slidable wall, said slidable wall being normally in position to be slid substantially horizontally and independently ot said first-mentioned walls in the direction in which the inner side ot said slidable wall faces, and the aforesaid bottom extending under said first-mentionedwalls in different adjustment-s of said rst-mentioned walls.

7. A mold of the character indicated comprising a pair ot spaced plates which are disposed to form two opposite upright walls respectively of the mold, a pair ot spaced opposite plates which are arranged substantially at a right angle to the first-mentioned plates and disposed to form upright walls of the mold, one of the second-mentioned plates being a slidable plate which extends between the first-mentioned plates and is normally in position to be slid substantially horizontally in the direction in which the inner side ot said slidable plate faces, the other ot the second-mentioned plates being movable into a posit-ion permitting movement of a. building' block or product substantially horizontally from between the lirst-mentioned plates by said slidable plate, and an upright stationary abutment-member at the outer side of and tor said slidable plate, said abutment-member having two sides which are opposite and converged toward said slidale plate, and said slidable plate abutting, in its normal position, against said abutment-member at adjacent portions of said sides of said abut-mentmember.

8. A mold ot' the character indicated comprising a pair of spaced opposite upright walls, two spaced opposite upright walls extending from one to the other of the lirstmentioned walls, one of the second-mentioned walls being a slidable wall which is normally in position to be slid substantially horizontally in the direc-tion in which the inner side of said slidable wall faces, the other of the second-mentioned walls being movable into a position permitting movement of a building block or product substantially horizontally from between the first-mentioned walls by said slidable wall, and an upright stationary abutment-member at the outer side of and for said slidable wall, said side of said slidable wall comprising two surfaces which are arranged opposite and converge toward said abutment-member.

9. A. mold of the character indicated comprising a pair of spaced opposite upright walls, two spaced oppositeV walls extending from one to the other of the first-mentioned walls, one of the second-mentioned walls being a slidable wall which is normally in position to be slid substantially horizontally in the direc-tion in which the inner side of said slidable wall faces, the other oli said second-mentioned walls being movable into a position permitting movement of a building block or product substantially horizontally from between the first-mentioned walls by said slidable wall, and an upright stationary abutment-member atthe out-er side of and for said slidable wall, said abutment-member having two surfaces converging toward and arranged opposite said slid-- able wall, and said slidable wall having two surfaces which converge toward and are opposite said abutment-member.

lO. A mold of the character indicated comprising two spaced opposite upright walls, two spaced upright walls extending from one to the other of the first-mentioned walls, one ot the second-mentioned walls being a slidable wall which is arranged between and substantially at a right angle to the first-mentioned walls and normally in position to move in the direction in which the inner side ot said wall faces, the other ot the second-mentioned walls being movable into a position permitting movement of a building block or product from between the lirst-mentioned walls by said slidable wall, and a stationary core substantially parallel with the path of and unatt-ached to and surrounded by and extending through said slidable wall and in the normal position of said wall tapering` trom the inner side ot' said wall in the aforesaid direction, the core-surrounding portion of said slidable wall and the core-portion surrounded by said wall having their opposing surtaces relatively arranged and contoured in the normal position of said wall to form a joint bet-Ween said wall and. said core-portion at the inner side of said wall and to space said wall from and circumferentially oi said core-portion substantially from said joint to the outer side of said wall.

ll. A mold comprising a bottom, two spaced opposite upright walls, two spaced upright walls extending from one to the other of the first-mentioned walls, one of the second-mentioned walls being a slidable wall which is arranged substantially at a right angle to and between the first-mentioned walls and normally in position to move in the direction in which its inner side faces and normally immovable in the opposite direction, the other ot the second-mentioned walls being movable into a position permitting movement of a building block or product from between the firstmentioned walls by said slidable wall, and a stationary core which is substantially parallel with the path of and unattached to and extends through said slidable wall, said core being closely embraced at the inner side of and by said slidable wall in the normal position of said wall, said slidable wall having a hole formed therein for the extension therethrough of said core, said hole being substantially uniform in diameter from end to end, and said core having its portion which extends through said slidable wall in the normal position of said wall tapering toward the outer side of said wall.

1Q. A mold comprising a bottom, two spaced opposite side walls, a slidable end wall arranged substantially at a right angle to and between the first-mentioned walls and normally in position to move in the direction in which its inner side faces, an end wall arranged opposite and spaced from said slidable wall and movable into a position permitting movementof a building block or product in said direction from between the first-mentioned walls, a stationary abutment-member for the outer side of said slidable wall in the normal position of said wall, and a core rigid with said abutment-member and substantially parallel with the path of and unattached to and surrounded by said slidable wall and extending through said wall and from said wall in the aforesaid direction in said position of said wall, the coresurrounding portion of said slidable wall and the core-portion surrounded by said wall having their opposing surfaces relatively arranged and contoured in said position of said wall to form a joint between said wall and said core-portion at the inner side of said wall and to form a space interiorly of said wall and around said core-portion substantially from said jointto the space between the outer side of said wall and the aforesaid abutment-member.

13. A mold of the character indicated comprising two plates disposed to form opposite side walls of a material-receiving chamber, a transverse plate normally held in position to forni one end wall of said chamber and adapted to be moved into a position permitting movement of the product formed in said chamber endwise of and from between the first-mentioned plates, a slidable transverse plate extending between said first-mentioned plates and normally arranged to form the other end wall of said chamber and in position to be slid toward the first-mentioned transverse plate, a standard opposite and spaced from the outer side of said slidable plate and rigid with the aforesaid bottom, an upright abutment-member between the standard and slidable plate and secured to the standard and arranged to form an abutment for said plate in the normal position of the plate, spaced endwise movable rods secured to said slidable plate and extending substantially horizontally from the plate loosely through said abutment-member and standard, and meansfor actuating said rods in unison.

14. A mold comprising a bottom, two spaced opposite upright walls, a slidable upright wall for one end of the spaceI between the first-mentioned walls and normally in position to move in the direction in which its inner side faces, an upright wall for the opposite end of said space and movable into a position permit-ting movement of a building block or product in said direction from between the first-mentioned walls, an abutment-member engaged by the outer side of said slidable wall in the normal position of said wall, and a stationary core substantially parallel with the path of and unattached to and surrounded by said slidable wall and eX- tending through said wall and from said wall in the aforesaid direction in said position of said wall, said slidable wall and the abutment-member being relatively contoured to form a space between them in the normal position of said wall, said slidable wall closely embracing the core at the inner side of said wall and having a hole for receivinv' the core, and the core-portion which extends through said hole in theI normal position of said wall being reduced in size transversely toward the last-mentioned space and out of contact with said wall in said position of said wall from said space substantially to the inner side of said wall.

In testimony whereof, we sign the foregoing specification, this 7th day of February, 1923.

OTTO E. BORNHAUSER. JOHN EDARD HERMAN. 

